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<head><meta charset="utf-8"><title>flag to disable migrate mode · t-compiler/wg-nll · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/index.html">t-compiler/wg-nll</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html">flag to disable migrate mode</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136866204" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> memoryruins <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136866204">(Oct 31 2018 at 17:04)</a>:</h4>
<p><a href="https://www.reddit.com/r/rust/comments/9sz54u/comment/e8sn5xc?st=JNXEEHLM&amp;sh=a0be7e7e" target="_blank" title="https://www.reddit.com/r/rust/comments/9sz54u/comment/e8sn5xc?st=JNXEEHLM&amp;sh=a0be7e7e">https://www.reddit.com/r/rust/comments/9sz54u/comment/e8sn5xc?st=JNXEEHLM&amp;sh=a0be7e7e</a></p>
<blockquote>
<p>I want to shift completely to the new borrowck when it releases and not run the old one at all.  Will there be any flags I can set for my projects to achieve this?</p>
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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136867575" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136867575">(Oct 31 2018 at 17:24)</a>:</h4>
<p>they can run <code>#![feature(nll)]</code> still, on nightly, to achieve that effect</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136875730" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136875730">(Oct 31 2018 at 19:39)</a>:</h4>
<p>But -- if I understand correctly -- you can also get the same effects with e.g. <code>#![deny(warnings)]</code> on 2018 edition</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136875807" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136875807">(Oct 31 2018 at 19:40)</a>:</h4>
<p>not entirely true</p>



<a name="136875810"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136875810" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136875810">(Oct 31 2018 at 19:40)</a>:</h4>
<p>but mostly true</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136875826" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136875826">(Oct 31 2018 at 19:40)</a>:</h4>
<p>if you use e.g. <code>#![feature(nll)]</code> we do disable some region error messages that would otherwise be hard errors</p>



<a name="136875855"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136875855" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nikomatsakis <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136875855">(Oct 31 2018 at 19:41)</a>:</h4>
<p>so basically some things might compile that wouldn't with <code>#![deny(warnings)]</code></p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/122657-t-compiler/wg-nll/topic/flag%20to%20disable%20migrate%20mode/near/136880630" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> simulacrum <a href="https://rust-lang.github.io/zulip_archive/stream/122657-t-compiler/wg-nll/topic/flag.20to.20disable.20migrate.20mode.html#136880630">(Oct 31 2018 at 20:54)</a>:</h4>
<p>ah, interesting</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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